#version 300 es
/**
 * Copyright 2015 Michael Leahy / TyphonRT, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Invert fragment shader - Inverts texture color by a given intensity between 0.0 (normal) - 1.0 (full invert);

precision mediump float;

in vec2 vTexCoord;

uniform sampler2D uSourceTex;
uniform lowp float intensity;

out vec4 outColor;

void main()
{
   lowp vec4 textureColor = texture(uSourceTex, vTexCoord);
   outColor = vec4(mix(textureColor.rgb, 1.0 - textureColor.rgb, intensity), textureColor.a);
}

